package cpsobras.util;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.hibernate.SessionFactory;

import cpsobras.util.HibernateUtil;

public class HibernateFilter implements Filter {
	private SessionFactory sf;
	
	public void init(FilterConfig config) throws ServletException {
		this.sf = HibernateUtil.getSessionFactory();
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, 
			FilterChain chain) throws ServletException {
		try {
			this.sf.getCurrentSession().beginTransaction();
			chain.doFilter(servletRequest, servletResponse);
			this.sf.getCurrentSession().getTransaction().commit();
			this.sf.getCurrentSession().close();
		} catch (Throwable ex) {
			try {
				if (this.sf.getCurrentSession().getTransaction().isActive()) {
					this.sf.getCurrentSession().getTransaction().rollback();
				}
			} catch (Throwable t) {
				t.printStackTrace();
			}
			throw new ServletException(ex);
		}
	}

}
